National Repository of Grey Literature 56 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Summary report on radiographic documentation of figurative decorations in the Bučovice castle ceremony hall
Valach, Jaroslav ; Eisler, Marek
This report summarizes the results of radiographic and endoscopic investigation of stucco and figural decorations located in the ceremony hall at the castle in Bučovice, Vyškov county. The internal structure of the statues and ornaments and their varying degree of fracture damage was documented using a portable set comprised of source and recording plates. The support structures used by the original artists as a vantage point for the modelling of their intended shapes were revealed and examined by means of radiography and endoscopy. This data is important for the art historian’s investigation of this cultural monument. Included in the report is a set of photographs and radiographs and their interpretation.
Utilization of image and signal processing techniques for assessment of built heritage condition
Koudelka_ml., Petr ; Koudelková, Veronika ; Doktor, Tomáš ; Kumpová, Ivana ; Kytýř, Daniel ; Valach, Jaroslav
Historical buildings represent invaluable heritage from the past and therefore their protection is a very important task. Assessment of their condition must not cause damage accumulation thus the least possible volume removed from the structure is essential. As many historical buildings in the Czech Republic are built using sandstone that can be considered as a typical heterogeneous system, statistical signal processing is a promising approach for determination of the representative volume element (RVE) dimensions. Such calculations can be carried out on the domain of logical arrays representing binary images of the materials microstructure. This paper deals with processing of image data obtained using SEM-BSE and high resolution flatbed scanner for determination of RVE dimensions. Advanced image processing techniques are employed and results from calculation using grayscale data are presented and compared with results calculated on the basis of color input images.
Glycobiology of the head and neck cancer
Valach, Jaroslav ; Smetana, Karel (advisor) ; Dřízhal, Ivo (referee) ; Říhová, Blanka (referee)
iii Abstract Glycobiology represents a very progressive subject of cell biology. Protein-saccharide interactions play not only supporting and cell organization role, but they also represent medium for information storage and its decoding. Galectins, group of animal lectins (saccharide-binding proteins), which have selective affinity to ß-galactosides, are multifactorial molecules. They participate in cell-cell and cell-matrix interaction, transmembrane signaling, apoptosis, pre- mRNA splicing and are also present in various types of carcinomas. High expression of galectin-1 has been detected in cancer stroma originated from squamous cell epithelium. In the previous study we established that the fibroblasts - myofibroblasts transition, apart from the known TGF- beta, is also induced by galectin-1. We compared relationship between galectin-1 expression, presence of myofibroblasts and gene expression in tissue samples from patients with head and neck squamous cell carcinoma. Cancer stroma with myofibroblasts was rich in galectin-1 expression in comparison with stroma without myofibroblasts. Moreover, we used microarray analysis (ILLUMINA) to compare the whole genome transcriptome from samples with and without presence of galectin-1. High expression of galectin-1 in tissue samples corresponded with expression...
Material characterization of historical roofing slate tiles and assessment of the state regarding the planned building reconstruction.
Drdácký, Miloš ; Slížková, Zuzana ; Frankeová, Dita ; Hasníková, Hana ; Hauková, Petra ; Koudelková, Veronika ; Kozlovcev, Petr ; Valach, Jaroslav ; Wolf, Benjamin
The report includes the results of the study focusing on the material properties of historical roofing slate tiles and assessment of the state regarding the planned building reconstruction.
Determination of thermal response of Carrara and Sneznikovsky marble used as building material
Petráňová, Veronika ; Valach, Jaroslav ; Viani, Alberto ; Pérez-Estébanez, Marta
Physical weathering of marble, widely used as a cladding material on buildings, is one of the most common damaging mechanism caused by anisotropic thermal expansion of calcite grains. The extent of marble deterioration depends mainly on stone fabric and texture. Dry cuboids of Carrara marble and marble from Dolni Morava quarry were subjected to microscopic analysis and thermal cycling, to determine the thermal expansion related to stone fabric and predominant lattice orientation of grains (i.e. texture).
Comparison of optical methods for characterization of glass mosaic weathering
Kocour, Vladimír ; Petráňová, Veronika ; Valach, Jaroslav
The work presented in this paper is a part of research project supported by Ministry of Culture and devoted to conservation of precious mosaic of 'Last Judgement' on St. Vitus Cathedral in Prague. The aim of the project is to enhance external protective polymeric coating on glass tesserae of mosaic and also to develop optical method for assessment of coating’s surface conditions. The paper concentrates on comparison of various methods for surface evaluation assesses their advantages and disadvantages and also discusses their suitability for long term monitoring of coating state, namely reflectometry, scanning probe microscopy, nanoindentation, white-light interferometry, and scanning electron microscopy. It is found that white-light interferometry and reflectometry methods are the most suitable ones for monitoring purposes.
Methodology for monitoring and evaluation of light parameters and biological indicators of internal environment depositories and expositions
Juliš, Karel ; Valach, Jaroslav ; Frankl, Jiří ; Štefcová, Petra ; Pech, Michal ; Kotyk, Michael
The methodology provides guidance procedures for monitoring and evaluation of automatically collected lighting parameters and biological indicators of internal environment depositories and expositions. There is specified a methodology, together with description of particular hardware components and software central point, which collects and evaluates the information acquired. The system, as a whole, is designed as a modular and open platform, which allows a wide variety of user modifications and customisation to almost any specific museum collection, repository or exhibition.
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Methodology for monitoring and evaluation of light parameters and biological indicators of internal environment depositories and expositions
Juliš, Karel ; Valach, Jaroslav ; Frankl, Jiří ; Štefcová, P. ; Pech, M. ; Kotyk, M.
The project focuses on automation of collection and evaluation of given physical and biological parameters of the museum expositions and repositories. There is specified a methodology, together with description of particular hardware components and software central point, which collects and evaluates the information acquired. The system, as a whole, is designed as a modular and open platform, which allows a wide variety of user modifications and customisation to almost any specific museum collection, repository or exhibition.
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Assessment of vibrations in museum's environment
Valach, Jaroslav ; Wolf, Benjamin ; Paulová, E. ; Urushadze, Shota
This paper deals with measurement of mechanical vibrations and accelerations threatening objects in museum collections. Two case studies are presented. The first case analyses situation in museum exhibitions strongly influenced by street traffic in its close proximity. It compares results obtained by sensitive professional measurement system to the custom-built user device for acceleration recording. The second case analyzes object’s accelerations during transport based on measurement by the custom-built device.
Semiautomatic Surface Reflectance Measurement for Monitoring of Material Weathering
Kocour, Vladimír ; Valach, Jaroslav
We present a device for measurement of surface reflectance in dependence on incidence angle and reflectance angle. This measurement enables us to quantitatively determine how much the surface is glossy or matt. The device is programmable, which enables us to choose non-equidistant steps of angles, and study special situations more in detail. It can be used for monitoring of material weathering or other types of degradation as weathering usually causes that the surface becomes more matt.

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2 Valach, Jan
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